136789 has 4 divisors (see below), whose sum is σ = 140524.
Its totient is φ = 133056.
The previous prime is 136777. The next prime is 136811. The reversal of 136789 is 987631.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 66564 + 70225 = 258^2 + 265^2
It is a cyclic number.
It is not a de Polignac number, because 136789 - 29 = 136277 is a prime.
It is a super-2 number, since 2×1367892 = 37422461042, which contains 22 as substring.
It is a Duffinian number.
It is a plaindrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (136709) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1812 + ... + 1885.
It is an arithmetic number, because the mean of its divisors is an integer number (35131).
2136789 is an apocalyptic number.
It is an amenable number.
136789 is a deficient number, since it is larger than the sum of its proper divisors (3735).
136789 is an equidigital number, since it uses as much as digits as its factorization.
136789 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3734.
The product of its digits is 9072, while the sum is 34.
The square root of 136789 is about 369.8499695823.
The cubic root of 136789 is about 51.5248882124.
The spelling of 136789 in words is "one hundred thirty-six thousand, seven hundred eighty-nine".